Surprising admissions from alarmist David Suzuki

Excerpts from this article, by David Suzuki with Dr. Faisal Moola:

In spite of all we have learned about our climate and our planet's natural systems over the past two decades, relatively big holes exist in our capacity to monitor where exactly global greenhouse gases are coming from and where they are going.
...
...critical questions remain. Half of the carbon dioxide we put into the atmosphere gets soaked up again. Where it goes is the subject of much debate. Some say the oceans; others say soils or plants. The reality is, we don't know for sure.